Which personal or social condition for an individual makes it harder to resist peer pressure having many friends using drugs or alcohol having a high self-esteem being an aggressive person

Well if you pick a machine to work on and that's gonna be your exercise if you don't stick to that machine your muscle strength your muscle mass rather will change because you haven't been doing it you change something in your exercise routine which changes your body's form of dealing with things for example you might become weaker or stronger depending on what kind of exercises you do in whether or not the machine you picked actually your muscles grow.

Idont understand what youre askimg